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Power Quality Transient Signal Test and Research of Harmonic Source Identification

Author: ZhuChun
Tutor: ZhuShouZhen
School: Tsinghua University
Course: Electrical Engineering
Keywords: Power Quality Wavelet Analysis Harmonic power flow Power flow
CLC: TM933.4
Type: Master's thesis
Year: 2005
Downloads: 503
Quote: 3
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Abstract


Studies of power quality problems , is an important field of power systems research frontier . Power systems increasingly nonlinear loads , power quality problems on the grid and distribution systems and caused direct harm to human life and may result in the loss of production is also growing , power quality is directly related to the overall effectiveness of the national economy . For various reasons, the power supply reliability and stability of the grid voltage amplitude levels and other indicators , the situation in China , especially behind. How to enhance and ensure the power quality has become a domestic electrician urgent need to address areas of important topics . In this paper the classification of power quality problems and the characteristics of various types of power quality problems are reviewed. Paper uses two methods into the orthogonal wavelet transform , multiresolution analysis methods as well as power mutagenesis analysis methods such as various types of short-term power quality disturbance signal analysis, design a dyadic wavelet analysis based on the calculation method used to detect transient pulse , transient oscillations, voltage sag and voltage swells and other transient power quality disturbance signal and disturbance for automatic type recognition . Through the wavelet theory research and data testing practices in the practical application of the method has achieved good results. Currently, both at home and abroad in the harmonic source identification of research, I hope to develop a more extensive and reliable for harmonic source localization method to solve the existing problem of power quality responsibility determination . This thesis study carried out in this regard . This paper analyzes the power system harmonic source impact on the grid to study the different nature of the relationship between the load and harmonics . Several examples are now being studied harmonic source identification technology principle , focusing on the current most widely used power system harmonic flow of harmonic power flow calculation and the application of law derived in harmonic power flow method the applicability of the network parameters without summarizes the impact of power flow method scope and reliability of relevant factors.

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CLC: > Industrial Technology > Electrotechnical > Electrical measurement techniques and instruments > Power the number of measurements and instrumentation > Power measurement,power meter
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